I was prescribed Doxy for my Rosacea and the first time I took it with plenty of water and vomited but I found out that it is better to have a full stomach of food instead. Now I have no problems with Doxy. I've been on it for almost 2 months now. I sure hope I don't have the symptoms that I have read in this site. Maybe I'm one of the lucky ones! Who knows? Good luck to all of you and hope you feel better.